<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>
<body>
    <button id="btn">按钮</button>
    <div id="app"></div>
    <script type="text/babel">
        const oBtn = document.getElementById("btn");
        const userData = ["HTML","CSS","JavaScript","NodeJS"];
        const vDom = <ul>
            {userData.map(item=>{
                return <li>{item}</li>
            })}
            </ul>
            const root = ReactDOM.createRoot(document.getElementById("app"));
            root.render(vDom);
            oBtn.onclick = function(){
                userData.push("React");
                const vDom = <ul>
                    {userData.map(item=>{
                        return <li>{item}</li>
                    })}</ul>
            root.render(vDom)
            }
    </script>
</body>
</html>